Best Aliens Games on Steam
Unlike generic lists, our strategy game recommendations use a rigorous analysis of Steam user reviews to identify and feature only the best, community-validated aliens games.
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Star Control®: Origins
Star Control is a space role-playing game in which you command Earth's first interstellar starship on a mission to save the Earth from hostile alien empires.
PLANET ALPHA
PLANET ALPHA, a beautiful alien world filled with mystery and danger. Pursued by relentless enemies, you must harness the power of night and day as you struggle to survive.
Earthfall
NOW AVAILABLE! When the Earth falls to an extra-terrestrial invasion, humanity becomes an endangered species. Earthfall is a four-player cooperative shooter that challenges players to survive hordes of ruthless alien drones and their inscrutable masters.
Quarantine Circular
In the middle of a world-ending pandemic, a group of scientists discover the galaxy has been watching. From the award-winning team behind Thomas Was Alone and Subsurface Circular, Quarantine Circular is the next mutation in text-based adventure.
Space Hulk: Deathwing Enhanced Edition
Space Hulk: Deathwing - Enhanced Edition is a First-Person Shooter based on Games Workshop’s cult classic board game set in Warhammer 40,000 universe. Expanding upon the original game, and featuring a host of new content, new features and a richer multiplayer mode.
Signal Simulator
Game inspired by SETI. Take the role of a scientist to find an extraterrestrial signal .Control massive Radio Antennas by using interactive control in your Observatory. Detect , download and decode unknown or story telling signals. Manage and Maintain an electrical system to improve your systems and make it more efficient.
Attack of the Earthlings
Take on Galactoil, a comically dysfunctional intergalactic energy corporation, and its larger-than-life employees in a tactical-stealth game that fuses satisfying strategic gameplay and dark comedy in a quirky single-player story.
Subnautica
Descend into the depths of an alien underwater world filled with wonder and peril. Craft equipment, pilot submarines and out-smart wildlife to explore lush coral reefs, volcanoes, cave systems, and more - all while trying to survive.
Swarm Queen
Swarm Queen is a quick-to-learn but tactical and challenging tug-of-war strategy game about insectoid aliens trying to murder each other.
Megaton Rainfall
Become an indestructible interdimensional superbeing in this first-person superhero game, and save Earth from an alien invasion. Be careful though - you are so powerful you can destroy entire skyscrapers (unintentionally) when you miss your otherworldly target...
Let Them Come
Let Them Come is a fast paced pixel art shoot ‘em up. Twitchy trigger fingers and focused battle tactics are the order of the day as wave after wave of alien-like creatures try to take you down.
HIVESWAP: ACT 1
A hand-drawn tribute to hilarious '90s adventure games (with none of the accompanying frustration). Play as Joey Claire, a puzzle-solving teen snatched out of her time (1994) and place (Earth) and stranded on a hostile alien planet on the brink of rebellion.
The Land of Pain
The Land of Pain is a Lovecraftian horror adventure. After something strange appears in the woods, you'll have to learn how to survive as you fend off a dark and disturbing evil. Flee from an unrelenting enemy, solve puzzles, and unravel the ancient mystery that's befallen this land.
X-Morph: Defense
Unique fusion of a top-down shooter and tower defense strategy. You are the invader! Use destructive weapons or lead your enemies into a maze of towers. Strategize in the build mode by carefully selecting various types of alien towers or throw yourself right into the heat of the battle.
Arcade Mayhem Juanito
Arcade Mayhem Juanito is a retro experience about arcade-hopping. Teleport into different video games, play with unique mechanics inspired by well-known arcade games, face stunningly animated bosses and join the fight against the clonocell invasion.
Solstice Chronicles: MIA
In this 2-player twin-stick shooter, use a friendly drone for a game-changing abilities. Survive waves, upgrade, and uncover the mystery in this cooperative, action-packed experience.
Tormentor❌Punisher
Everything in Tormentor❌Punisher can be killed in one hit, from bosses to yourself. Bosses conjure traps to make the arena hellish. Demons adjust to your play style and punish you. Perform combos on enemies and gain cool upgrades. Reload your machine gun by firing your shotgun. Let's do this!
Prey
In Prey, you awaken aboard Talos I, a space station orbiting the moon in the year 2032. You are the key subject of an experiment meant to alter humanity forever – but things have gone terribly wrong. The space station has been overrun by hostile aliens and you are now being hunted.
Alien Swarm: Reactive Drop
Co-operative top-down shooter game available for free. An epic bug hunt featuring a unique blend of co-op play and squad-level tactics.
Halo Wars: Definitive Edition
Halo Wars: Definitive Edition is an enhanced version of the real-time strategy classic, Halo Wars, updated to run natively on PC. Halo Wars: Definitive Edition includes improved graphics, new achievements and all of the DLC created for the landmark real-time strategy game.
Cosmic Express
Plan the train route for the universe's most awkward space colony!
Codex of Victory
In this sci-fi turn-based strategy with real-time base-building elements, you’ll be defending human territories against the transhuman Augments. Expand your HQ, and manufacture and upgrade an army of advanced drones to wage interplanetary war for Humanity!